Morgues in Canada and the U.S. are bursting with the corpses of people killed by fentanyl.

Both countries are dealing with an epidemic of drug overdoses that has ripped families apart and killed thousands.

Now, even the bad guys are concerned.

On the infamous dark web, all manner of narcotics — from heroin to hash — can be purchased by anonymous peddlers.

But now, there’s fentanyl and many on the dark web are giving it a pass because of its deadly nature.

According to The Guardian, online pushers are saying the drug is too dangerous to trade.

The funeral of Ottawa man Sandy Forsyth at the Beechwood Cemetery Ottawa Friday Nov 17, 2018. Sandy died of a fentanyl overdose. POSTMEDIA

The National Crime Agency in the U.K., is reporting that dealers on the dark web are “delisting” the drug, classifying it among items that are too high-risk to trade.

One of the reasons is practical: a fentanyl death could serve up a murder charge.

“If they’ve got people selling very high-risk commodities, then it’s going to increase the risk to them,” the agency’s Vince O’Brien told The Guardian.

“There are marketplaces that will not accept listings for weapons and explosives — those are the ones that will not accept listings for fentanyl. Clearly, law enforcement would prioritize the supply of weapons, explosives and fentanyl over, for example, class C drugs — and that might well be why they do this.”

He added: “There are also drug users on the dark web who say on forums that they don’t think it’s right that people are selling fentanyl because it is dangerous and kills a lot of people.”

The drug killed rock legend Tom Petty in 2017. GETTY IMAGES

Fentanyl was created in the 1950s by a Belgian chemist and is commonly used to treat people with cancer and chronic pain.

But the drug is reportedly 30 to 50 times stronger than heroin, and up to 100 times more potent than morphine.

It is commonly referred to as a “zombie drug.”

Many of its victims are unaware they are ingesting fentanyl because many dealers are cutting other drugs with the cheap medication.

“The high would not be dissimilar to heroin or morphine — they get a euphoric feeling,” David Scott of the Australian and New Zealand College of Anaesthetists told News.com last year .

“You must remember some people aren’t actively choosing to take it — they are buying heroin for the heroin euphoric feeling, and then are overdosing because someone at some point has cut in fentanyl as well.

“And if you get a big dose, especially one mixed illicitly where there’s no quality control — it’s even more deadly.”

More than 72,000 Americans died from overdoses in 2017, up from 20,000 in 2001, according to the Centers for Disease Control and Prevention.

The number of deaths related to synthetic opioids, including fentanyl, doubled in 2016 and is now 30,000.